7900-O-profiles-header

O-profiles 7900

For EMI shielding applications in grooves

Several types of O-profiles have been developed for different applications, each with its own advantages. O-profiles were originally designed for high-performance shielding, mainly for military applications. They are used when environmental sealing and EMI screening are required, and where there is not much space.

Four kinds of extrusion types are available: 1: hollow,
2: solid, 3: Cell Rubber and 4: rectangular. These extrusion cores can be covered with metallized fabric foil or they can be made out of conductive rubber. For optimal shielding performance a compression of 5-10% is recommended for solid elastomer’s and 10-50% for hollow extrusions and sponge rubbers.

Benefits

  • Easy to fit into grooves
  • Deflection up to 50%
  • Low closure force

Options (on request)

  • Cut into accurate lengths or endless O-rings
  • Drop-out prevention fixtures
  • UL94V-0 flame-retardant version
  • High temperature-resistant Silicone core (up to 220 °C)
  • Fluorosilicone (silver aluminium, silver copper, nickel, nickel graphite) for applications with chemicals

7900-O-profiles can be delivered on reel
Can be delivered on reel or in length you desire
7900-o-profile-in-use
Example of the O-profile in use
7900-different shapes and sizes
It can be delivered in different shape & sizes

Compression

Solid elastomer’s cannot be compressed much. They are easily deformed but the volume does not change as would be the case with sponge elastomer (PVC, EPDM, Neoprene) so that allowance for material flow must be considered in the groove design.

7900-different shapes and sizes


The figure below shows two different groove designs.
On the left there is a typical rectangular groove, while
the design on the right can mechanically retain circular cross-section gaskets by side friction.

7900-profiles how to use

Material options

Type Code Core Cover
7900-x-1-1-x 1-1 Neoprene Amucor foil
7900-x-1-2-x 1-2 Neoprene Conductive fabric
7900-x-2-1-x 2-1 Silicone Amucor foil
7900-x-2-2-x 2-2 Silicone Conductive fabric
7900-x-3-1-x 3-1 PVC Amucor foil
7900-x-3-2-x 3-2 PVC Conductive fabric
7900-x-4-1-x 4-1 EPDM Amucor foil
7900-x-4-2-x 4-2 EPDM Conductive fabric
7900-x-5-3-x 5-3 Silvered particles filled silicone rubber -
7900-x-5-4-x 5-4 Nickel filled silicone rubber -
7900-x-5-5-x 5-5 Graphite filled silicone -
X needs to be replaced for extrusion type & dimensions

Extrusion types

7900-profiles extrusion type

Special materials (on request)

These O-profiles are also available in special materials for special applications for example applications with chemicals. Below is a list of special materials. For availability and delivery please email [email protected].

  • Silicone Carbon
  • Fluorosilicone Nickel Graphite
  • Silicone Nickel Graphite Flame Retardant
  • Silicone Silver Aluminium
  • Fluorosilicone Silver Aluminium
  • Fluorosilicone Nickel
  • Silver Plated Nickel
  • Silver Glass

Shielding performance and technical details table (dB)

Shielding effectiveness depends on the surface, the shape of gaskets and the materials used.

Conductive Filler Conductive fabric Amucor Graphite Nickel Graphite Silver Aluminum Silver Copper Nickel Fluoro Nickel Graphite Fluoro Silver Aluminum Fluoro Silver Copper Fluoro Nickel
  Standard On request
Frequency Shielding Performance STD 285 /MIL-DTL 83528C (dB) Shielding Performance STD 285 /MIL-DTL 83528C (dB)
10 MHz N/A N/A 30 115 111 115 114 116 114 116 110
100 MHz 60 65 65 121 120 122 115 122 122 125 116
400 MHz 98 110 60 119 120 119 121 119 118 118 124
1 GHz 94 108 N/A 122 121 123 114 122 121 124 117
2 GHz 91 105 40 122 119 122 122 122 123 121 112
6 GHz 90 102 N/A 115 115 116 117 114 109 117 111
10 GHz 90 100 30 114 112 115 114 107 114 115 113
18 GHz N/A N/A N/A 106 105 104 105 105 103 104 103
OperatingTemp - - +160 +160 +160 +125 +160 +160 +160 +125 +160
Range (C) - - -50 -55 -55 -55 -55 -55 -55 -55 -55
Colour Grey Silver Black Dark Grey Beige Dark Tan Grey Green Light Green Green Dark Green
Shore Hardness (A +/-5) ASTM D2240 - - 60 60 65 65 65 65 70 65 70
Volume Resistivity (ohms) ASTM D991 - - 2.2 0.04 0.008 0.005 0.1 0.05 0.01 0.005 0.1
Specific Gravity (+/- 0.25) - - 2.0 2.0 2.0 3.5 4.5 2.2 2.0 4.0 4.8

Standard extrusions (other sizes on request)

Type 1: Hollow

7900-profiles type1
Hollow
Part number Outside A (mm) Inside B (mm)
7900-1-X-X-0.9-0.3 0.9 0.3
7900-1-X-X-1.2-0.5 1.2 0.5
7900-1-X-X-1.6-0.5 1.6 0.5
7900-1-X-X-1.8-0.5 1.8 0.5
7900-1-X-X-1.9-0.7 1.9 0.7
7900-1-X-X-2.0-0.5 2.0 0.5
7900-1-X-X-2.0-0.8 2.0 0.8
7900-1-X-X-2.4-0.8 2.4 0.8
7900-1-X-X-2.4-1.0 2.4 1.0
7900-1-X-X-2.6-1.5 2.6 1.5
7900-1-X-X-3.0-0.5 3.0 0.5
7900-1-X-X-3.0-0.8 3.0 0.8
7900-1-X-X-3.0-1.0 3.0 1.0
7900-1-X-X-3.0-1.6 3.0 1.6
7900-1-X-X-3.2-0.8 3.2 0.8
7900-1-X-X-3.2-1.1 3.2 1.1
7900-1-X-X-3.2-1.5 3.2 1.5
7900-1-X-X-3.5-0.8 3.5 0.8
7900-1-X-X-3.5-1.6 3.5 1.6
7900-1-X-X-3.6-1.5 3.6 1.5
7900-1-X-X-4.0-1.1 4.0 1.1
7900-1-X-X-4.0-1.3 4.0 1.3
7900-1-X-X-4.0-1.6 4.0 1.6
7900-1-X-X-4.0-2.0 4.0 2.0
7900-1-X-X-4.1-2.0 4.1 2.0
7900-1-X-X-4.5-1.6 4.5 1.6
7900-1-X-X-4.8-2.4 4.8 2.4
7900-1-X-X-5.0-1.6 5.0 1.6
7900-1-X-X-5.0-3.0 5.0 3.0
7900-1-X-X-5.5-1.6 5.5 1.6
7900-1-X-X-5.5-3.2 5.5 3.2
7900-1-X-X-6.0-1.6 6.0 1.6
7900-1-X-X-6.0-3.2 6.0 3.2
7900-1-X-X-6.0-4.0 6.0 4.0
7900-1-X-X-6.4-1.6 6.4 1.6
7900-1-X-X-6.4-3.2 6.4 3.2
7900-1-X-X-8.0-5.0 8.0 5.0
7900-1-X-X-8.0-6.0 8.0 6.0
7900-1-X-X-9.0-6.4 9.0 6.4
7900-1-X-X-9.5-6.4 9.5 6.4
7900-1-X-X-10.0-7.0 10.0 7.0
7900-1-X-X-10.0-8.0 10.0 8.0
7900-1-X-X-12.0-8.0 12.0 8.0
7900-1-X-X-15.0-12.0 15.0 12.0
7900-1-X-X-16.0-12.0 16.0 12.0
7900-1-X-X-20.0-16.0 20.0 16.0

The X must be replaced for the desired base material code and conductive material code. Other sizes on request

Type 2: Solid

7900-profiles type 2
Solid Suggested groove dimensions
Part number Diameter (mm) Depth
+/-
0.005
Width 97% max groove fill
7900-2-X-X-1.0 1.0 0.74 1.60
7900-2-X-X-1.2 1.2 0.94 1.70
7900-2-X-X-1.4 1.4 1.04 1.83
7900-2-X-X-1.6 1.6 1.24 2.01
7900-2-X-X-1.8 1.8 1.42 2.18
7900-2-X-X-2.0 2.0 1.63 2.39
7900-2-X-X-2.4 2.4 1.93 2.72
7900-2-X-X-2.6 2.6 2.13 2.97
7900-2-X-X-2.8 2.8 2.34 3.17
7900-2-X-X-3.0 3.0 2.59 3.33
7900-2-X-X-3.2 3.2 2.71 3.53
7900-2-X-X-3.5 3.5 2.90 3.86
7900-2-X-X-4.0 4.0 3.28 4.34
7900-2-X-X-4.5 4.5 3.54 4.63
7900-2-X-X-4.8 4.8 3.91 5.08
7900-2-X-X-5.0 5.0 4.06 5.26
7900-2-X-X-5.4 5.4 4.50 5.94
7900-2-X-X-5.5 5.5 4.55 6.04
7900-2-X-X-6.0 6.0 4.90 6.45
7900-2-X-X-6.4 6.4 5.15 6.75
7900-2-X-X-7.0 7.0 5.74 7.39
7900-2-X-X-7.5 7.5 6.04 7.85
7900-2-X-X-8.0 8.0    
7900-2-X-X-8.5 8.5    
7900-2-X-X-9.0 9.0    
7900-2-X-X-9.5 9.5    
7900-2-X-X-10.0 10.0    
7900-2-X-X-11.0 11.0    
7900-2-X-X-12.0 12.0    
7900-2-X-X-15.0 15.0    
7900-2-X-X-18.0 18.0    
7900-2-X-X-20.0 20.0    

The X must be replaced for the desired base material code and conductive material code. Other sizes on request

Type 3: Cell rubber

7900-profiles type 3
Cell Rubber
Part number Diameter (mm)
7900-3-X-X-2.1 2.1
7900-3-X-X-3.0 3.0
7900-3-X-X-3.5 3.5
7900-3-X-X-4.0 4.0
7900-3-X-X-4.5 4.5
7900-3-X-X-5.0 5.0
7900-3-X-X-5.5 5.5
7900-3-X-X-6.0 6.0
7900-3-X-X-6.5 6.5
7900-3-X-X-7.0 7.0
7900-3-X-X-7.5 7.5
7900-3-X-X-8.0 8.0
7900-3-X-X-8.5 8.5
7900-3-X-X-9.0 9.0
7900-3-X-X-9.5 9.5
7900-3-X-X-10.0 10.0
7900-3-X-X-11.0 11.0
7900-3-X-X-12.0 12.0
7900-3-X-X-15.0 15.0
7900-3-X-X-18.0 18.0
7900-3-X-X-20.0 20.0
7900-3-X-X-22.0 22.0
7900-3-X-X-25.0 25.0

The X must be replaced for the desired base material code and conductive material code. Other sizes on request

Type 4: Rectangular

7900-profiles type 4
Rectangular
Part number Width A (mm) Height B (mm)
7900-4-X-X-0.25-1.0 0.25 1.0
7900-4-X-X-0.25-1.5 0.25 1.5
7900-4-X-X-0.25-2.0 0.25 2.0
7900-4-X-X-0.25-2.5 0.25 2.5
7900-4-X-X-0.25-3.0 0.25 3.0
7900-4-X-X-0.5-1.0 0.5 1.0
7900-4-X-X-0.5-1.5 0.5 1.5
7900-4-X-X-0.5-2.0 0.5 2.0
7900-4-X-X-0.5-2.5 0.5 2.5
7900-4-X-X-0.5-3.0 0.5 3.0
7900-4-X-X-0.8-1.0 0.8 1.0
7900-4-X-X-0.8-1.5 0.8 1.5
7900-4-X-X-0.8-2.0 0.8 2.0
7900-4-X-X-0.8-2.5 0.8 2.5
7900-4-X-X-0.8-3.0 0.8 3.0
7900-4-X-X-1.0-1.0 1.0 1.0
7900-4-X-X-1.0-1.5 1.0 1.5
7900-4-X-X-1.0-2.0 1.0 2.0
7900-4-X-X-1.0-2.5 1.0 2.5
7900-4-X-X-1.0-3.0 1.0 3.0
7900-4-X-X-1.5-1.0 1.5 1.0
7900-4-X-X-1.5-2.0 1.5 2.0
7900-4-X-X-1.5-3.0 1.5 3.0
7900-4-X-X-1.6-1.0 1.6 1.0
7900-4-X-X-1.6-1.6 1.6 1.6
7900-4-X-X-1.8-1.0 1.8 1.0
7900-4-X-X-1.8-1.6 1.8 1.6
7900-4-X-X-2.0-1.0 2.0 1.0
7900-4-X-X-2.0-1.6 2.0 1.6
7900-4-X-X-2.0-2.0 2.0 2.0
7900-4-X-X-2.0-3.0 2.0 3.0
7900-4-X-X-2.4-2.0 2.4 2.0
7900-4-X-X-3.0-2.0 3.0 2.0
7900-4-X-X-3.2-1.6 3.2 1.6
7900-4-X-X-12.7-1.6 12.7 1.6
7900-4-X-X-12.7-2.0 12.7 2.0
7900-4-X-X-12.7-3.0 12.7 3.0
7900-4-X-X-12.7-4.8 12.7 4.8
7900-4-X-X-15.9-1.6 15.9 1.6
7900-4-X-X-15.9-2.0 15.9 2.0
7900-4-X-X-19.0-2.0 19.0 2.0
7900-4-X-X-22.35-1.6 22.35 1.6
7900-4-X-X-22.35-2.0 22.35 2.0
7900-4-X-X-25.4-6.4 25.4 6.4

The X must be replaced for the desired base material code and conductive material code. Other sizes on request


7910 Conductive jointed O-rings

We also supply Conductive jointed O-rings. The 7910 series are practically the same as the 7900 series O-Profiles, however, this is a turnkey closed O-ring. They are used where environmental and EMI screening is required but were little space is available.

For more information about check out our 7910 Conductive jointed O-rings page.

9710 - conductive O-rings

 

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Technical datasheets

General documentation

To get a quotation for Conductive rubber O-profiles within 24 hours fill in the form below.

Select an option:
1 : Hollow
2 : Solid
3 : Sponge rubber
4 : Rectangular
Select an option:
1 : Neoprene
2 : Silicone
3 : PVC
4 : EPDM
5 : Conductive rubber
Select an option:
1 : Amucor foil
2 : Conductive fabric
3 : Silver
4 : Nickel
5 : Graphite
See the dimensions table for the possible dimensions by the chosen extrusion type for example 3.2/1.6
Specify the length in mm
* Note: The red blocks are required